mirror of
https://github.com/holdmysocks/ps5-tailscale.git
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holdmysocks
4554502591
A payload that runs the Tailscale client (tsnet, userspace networking) on a jailbroken PS5: a C launcher built with ps5-payload-sdk that loads a Go program in-process, an installer that registers it with the console's payload autoloader and adds a home screen icon, and the patch that makes Go 1.27.1 speak the PS5's FreeBSD 9 era syscall interface.
71 lines
2.2 KiB
Go
71 lines
2.2 KiB
Go
package main
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import (
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"io"
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"net"
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"net/netip"
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"slices"
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"strconv"
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"time"
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)
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// forwardToLocalhost is tsnet's fallback TCP handler: it is asked about every
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// tailnet connection to a port nothing in this process listens on. If a
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// service on the console listens on that port, the connection is accepted and
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// piped to it. That is what makes FTP, the payload loader and the like
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// reachable over the tailnet.
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//
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// The local connection is made before answering, while the tailnet peer is
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// still waiting for its SYN-ACK. If nothing listens on the port the
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// connection is declined, so the peer sees an ordinary "connection refused"
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// rather than a connection that opens and closes.
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func (d *daemon) forwardToLocalhost(src, dst netip.AddrPort) (handler func(net.Conn), intercept bool) {
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port := dst.Port()
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if slices.Contains(d.cfg.BlockedPorts, port) || port == d.proxyPort || d.fwd.listensOnTCP(port) {
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// The outbound proxy and the local forwards are for the console's
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// own apps. Exposing them would let any tailnet device use the
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// console as a relay.
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return nil, false
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}
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local, err := net.DialTimeout("tcp", net.JoinHostPort("127.0.0.1", strconv.Itoa(int(port))), 2*time.Second)
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if err != nil {
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return nil, false
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}
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// If the tailnet side never completes its handshake the handler is not
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// called; do not keep the local connection open for it forever.
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abandoned := time.AfterFunc(30*time.Second, func() { local.Close() })
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return func(c net.Conn) {
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defer c.Close()
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defer local.Close()
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if !abandoned.Stop() {
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return
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}
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if port != d.webPort {
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// The status page polls every few seconds; logging its own
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// requests would bury everything else.
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d.logf("forward %v -> localhost:%d", src, port)
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}
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pipe(c, local)
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}, true
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}
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// pipe copies in both directions until both sides are done.
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func pipe(a, b net.Conn) {
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done := make(chan struct{}, 2)
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cp := func(dst, src net.Conn) {
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io.Copy(dst, src)
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// Pass the end of the stream on, so that protocols relying on a
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// half-close (such as sending a payload to the ELF loader) work.
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if cw, ok := dst.(interface{ CloseWrite() error }); ok {
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cw.CloseWrite()
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} else {
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dst.Close()
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}
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done <- struct{}{}
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}
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go cp(a, b)
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go cp(b, a)
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<-done
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<-done
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}
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